Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"farm ponds"”.
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Limnology of Three Farm Ponds in South-Central South Dakota
… chemical, and biological aspects of three farm ponds in south-central South Dakota were studied from June 1964 until December 1965. Maximum water temperature at the surface reached 25.2 C, while water temperatures at the bottom of the ponds were about 2 to 4C lower than the surface. Light …
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A theoretical and empirical consideration of trophic dynamics in some Kansas farm ponds
Digitized by Kansas Correctional Industries
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A theoretical and empirical consideration of trophic dynamics in some Kansas farm ponds
Digitized by Kansas Correctional Industries
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Small water, big potential: farm ponds and their potential for native fish conservation
Small impoundments, particularly farm or agricultural ponds, are often overlooked as potential habitat for native species despite their ubiquity across many human altered landscapes. Farm ponds intermittently connect to streams during floods allowing species exchanges to and from these novel …
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Farm ponds of the eastern Great Plains: Key challenges and opportunities for conserving amphibians in these novel ecosystems
Farm ponds are numerous in the agricultural landscapes of the Eastern Great Plains of the United States. These ponds are constructed to support a variety of functions, including erosion control, cattle grazing, and recreational fishing, but their role in supporting native biodiversity, including …
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Some Limnological Conditions Relative to Winter Kill of Fish in Ice-Covered Representative Farm Ponds in Eastern South Dakota
An aquatic environment involves many complex relationships biologically, physically, and chemically. Many of these relationships are difficult to measure or are little understood. In nature, aquatic environments accommodate many types of aquatic life. Ecological disturbances may cause the …
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Evaluation of Structure and Growth of Bluegills and Black Bullheads Stocked With Largemouth Bass in South Dakota Farm Ponds
… (Ictalurus melas) stocked in South Dakota farm ponds with largemouth bass (Micropterus salmoides). Bluegills and black bullheads reproduced during the second growing seasons and by the end of the study three year-classes of fishes were present in most ponds. Mean back-calculated bluegill …
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Experimental cage culture of channel catfish in Virginia
… channel catfish in cages moored in small farm ponds, showed that the fish would have to be sold for more than $.610 per kg ($.277/lb.) to make the operation profitable. Cage culture of channel catfish is possible in Virginia, but is not generally recommended for small still-water farm …
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An Evaluation of the Fishery Resource in a portion of the James River, South Dakota Scheduled for Channel Modification
… also occurs under the ice in prairie lakes and farm ponds. Turbidity was less in the flooded areas. The flooded areas acted as a natural buffer against downstream flooding. During the 1975 summer the major food source for piscivorous and omnivorous fishes was young-of-the-year carp. The fishes …
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Infrastructure investment and policy management of water resources for small-scale irrigated agriculture
… the options for enhancing the welfare of small farmers in Thailand through subsidies of irrigation infrastructure. Enhanced water storage and irrigation can significantly improve yield and the welfare of the farm community by providing a more reliable water supply during growing periods. …
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The population structure and demography of Triturus cristatus in agricultural landscapes of North-West England
… distributed in the UK countryside. Traditional farming practices, such as the digging of ponds for livestock, created suitable habitats for T. cristatus and consequently the species was much more common in the past. Over the last 70 years the nature of farming has fundamentally changed and the …
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Transforming an Exotic Species: Nineteenth-Century Narratives About Introduction of Carp in America
… politicians, scientists, commercial fishers, farmers, and writers. Public discourse was initially dominated by carp advocates led by USFC chief Spencer Baird, whose hype about its potential as a food fish for farm ponds sparked a 'fever of enthusiasm' for the thousands of free carp distributed …
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Population Dynamics of Copepoda and Cladocera in an Iowa farm pond, Summer 1973
The problem. To calculate rates for birth, death, and natural increase of zooplankton found in an unpolluted artificial pond. This will serve as a basis for comparisons with other bodies of water to show man's effect upon one of the most basic of all ecosystems. Procedure. Water samples were …